Sectional adjustable pressure-bar and chip-breaker for wood-planing machines



(No Model.)

0. s. WARNER.

,SEOTIONAL ADJUSTABLE PRESSURE BAR AND CHIP BREAKER FOR WOOD PLANINGMACHINES.

al-S & WITNESSES Q N INVENTOR,

I 6 I 5} 5 M MW M Attorney UNITED STATES PATENT FFHJE CHARLES S.\VARNER, OF GLOVERSVILLE, NE\V YORK.

SECTIONAL ADJUSTABLE PRESSURE-BAR AND CHIP-BREAKER FOR WOOD-PLANINGMACHINES.

SPECIFICATION forming part of Letters Patent No. 388,094, dated August21, 1888.

Application filed May 11, 1888.

To all whom it may concern:

Be it known that I, CHARLES S. WARNER, a citizen of the United States,residing at Gloversville, in the county of Fulton and State of New York,have invented a certain new and useful Improvement in SectionalAdjustable Pressure-Bars and Chip-Breakers for Wood- Planing Machines,of which the following is a full, clear, and exact description.

This invention relates to that class of pressure-bars for wood-planingmachines in which a number of shoes or blocks or equivalentpressure-applying devices are employed to hold properly the lumber whilebeing planed.

The object of the invention is to provide a sectional pressure-bar toextend across the entire bed of the planer, and in which the sectionsyield independently of one another, and are separately selfadjusting andself-conforming to the surfaces and planes of the lumber being actedupon, the pressure being applied directly to the shoes rather than upontheir bearings or axes, as has been done heretofore where rollers havebeen used.

A further object of the invention is to provide such a sectionalself-adjusting pressurebar with auxiliary adjusting mechanism wherebythe whole bar may be adjusted as to its height from the bed and also asto its distance from the cutter.

The invention consists in a wood-planer pressure-bar having asuitablenumber of shoes, each independently suspended from or connected with acompound lever of substantially the construction of a vehicledraft-equalizer, and hereinafter termed an equalizer, and the inventionalso consists of adjustable supporting mechanism for the pressure-bar,all as I will proceed now to set forth and particularly claim.

In the accompanying drawings, illustrating my invention, in the twofigures of which like parts are similarly designated, Figure 1 is aperspective view; and Fig, 2, a vertical section taken on the plane ofline a: :c, Fig. 1.

In the form of my invention shown in the drawings and illustrating theprinciple thereof, a frame, A, is employed of dimensions andconstruction adequate to the machine upon which it is to be used. Thisframe is rectan- (No model.)

gular in outline, and is composed of atop rail, a, the bot-tom rail, 1),and the intermediate cross-rail, c, all connected by side or end piecesd d. The rail bis made with a longitudinal groove, 1), and this grooveis intersected by a number of transverse openings, ZF, correspondingwith the number of shoes used. The shoes 6 have substantially theoutline indicated in Fig. 2, and are preferably as long as the marrowest lumber for which the planer is designed. Each shoe has a shank,e, fitted to play in the groove 1) of the bottom rail, 1). A stem, f, isfitted by a pivot, f, in a socket, f, substantially in the longitudinalcenter of the shank e, and this socket is made enough larger than thestem to permit lateral play or oscillation of the shoe on the stem andin the grooved bottom rail, so as to make it self-conforming to thevarying plane of the lumber. An adjustable collar, g, is arranged uponthe stem f, just above the bottom rail, to limit the descent of theshoe.

In a pressure bar having four shoes, as shown, I employ an equalizer-barcomposed of two short levers, h h, pivoted centrally to the ends of athird and longer lever, i, which in turn is pivoted to a stem,j, passedthrough the top rail and acted upon by a counterbalancing weightedlever, k, secured to the frame. The four shoes are connected by theirfour individual stems to the ends of the levers h. By this constructionof equalizer the frame only becomes its limit of movement, and henceeach shoe has its individual movement first through its lever h and thenthrough the common lever z. Thus, also, the pressure is equablydistributed, while not at all interfering with but rather promoting theadaptability of the shoes to boards of different thickness, of varyingplanes, and of individual variations in cross section.

The pressure-bar is secured to the machine preferably to the frame ofthe eutter-head-by curved arms or brackets Z, having grooved ways m, inwhich the bottom rail, b, is fitted to slide by its lugs a, set-screws 0being employed to fix the proximate adjustment of the pressure-barrelatively to the cutter-head.

The arms or brackets may be pivoted at their ends Z and be provided withset-screws 1 arranged in lugs Z projecting laterally from the bracketsand adapted to bear upon some fixed part of the machine-frame, so as toadjust the height of the pressure-bar from the bed of the planer. Ajam-nut, I, may be used to secure each set-screw on its lug.

It will be observed that the shoes are not fastened to the fra1ne,butare simply suspended therein. The grooved bottom rail limits their rise,and the collars g on the stems limit their fall. Practically this leavesthe shoes with entire freedom of movement within the range of desirableor necessary adj ustability. Again, the equalizer is not connected orfixed to the frame, but is suspended therein, the upper rail andcross-rail preventingits escape in their directions and the stems f andj preventing lateral escape. The weighted lever 70 gives the necessarypressure upon the shoes, and by adjusting the weight on the lever thatpressure may be varied.

Instead of four shoes, any multiple of that number of shoes may beemployed by correspondingly increasing the equalizers.

What I claim is 1. A pressure bar for wood planing machines, comprisinga frame, a grooved bottom rail therein, a suitable number of shoeshaving shanks arranged in said grooved rail, an equalizer composed oftwo levers, to the ends of which the shoes are flexibly connected, and athird frcely-movinglever, to which the said two levers are pivoted, anda counterbalancing device, substantially as described.

2. A frame, A, composed of a top rail, a grooved bottom ra i l,anintermediate cross-rail, and suitable connections, combined with aseries of shoes having shanks arranged in said grooved rail, athree-lever equalizer,and stems flexibly connected to the shoes and tothe equal-- izer, and a counterbalancing device,whereby individualselfadj ustment is permitted to each shoe, substantially as described.

3. A frame composedof a top rail and a grooved bottom rail, combinedwith..a series of shoes having shanks fitted looosely in'saidf bottomrail, stems flexibly pivoted to said shanks about midway of theirlengths and provided with adjustable detents for limiting the descent ofthe shoes, a three-lever equalizer loosely arranged in said frame, andto which said stems are flexibly connected, and a counterbalancingdevice applied to said equalizer, substantially as described.

4. A frame, A, comprising a top rail and a grooved bottom rail, combinedwith an equalizer composed of the levers h h, the lever z, to

the ends of which said first-named levers are pivoted, and which lever13 is provided with a stem or post rising freely through the top rail ofthe frame, the equalizer being thus freely suspended within the frame, acounterbalancing device applied to the equalizer stem or post, and shoesarranged in the grooved botto'm rail, and stems connected flexibly tothe shoes and to the levers h h, substantially as described.

5. A pressurebar for wood-planing machines, composed of a frame having abottom rail, shoes therein, and an equalizer to which such shoes areconnected, combined with pivotal arms or brackets having grooved ways m,receiving lugs on the bottom rail, and setscrews for fixing the bottomrail in adjusted position in said ways,to vary the proximity of 7 5 thepressure-bar to the cutter-head, substantially as described. T

6. A pressure bar for wood-planing machines, composed of a frame havinga bottom rail, shoes therein, and an equalizer to which such shoesareconnected, combined with pivotal arms or brackets having grooved ways m,receiving lugs on the bottom rail, and setscrews for fixing the bottomrail in adjusted position in said ways, to Vary the proximity of thepressure-bar to the cutter-head, and set screws on the sides of thebrackets or arms,to vary the heightof the pressure-bar from the bed ofthe planing-machine, substantially as described. I

In testimony whereofI have hereunto set my hand this 9th day of May, A.D. 1888.

' I CHARLES S. WARNER.

Witnesses l FRANK L. EASTERLY,

NELSON H. ANIBAL.

